The screenshot is definitely 100% real. I've worked with Photoshop for years now and this does not look in one bit "photoshopped"

It looks blurry obviously because it was taken hastily and with a cellphone camera to avoid being caught I suppose.

I think people are just in denial. Sixen said the #D3anonymous info was a hoax, but he didn't mention anything about this photo and I'm pretty sure he won't until August 1st. If it was fake he would've said something by now like he did with the Twitter guy, but he hasn't. That pretty much confirms the legitimacy of the screenshot since he won't say it is real as well otherwise he would be breaking the NDA.

If you look at the minimap, it has a perfect fade on the lower left side of it and that makes perfect sense considering the entrance is on the right lower side.

The guy that uploaded the screenshot has taken it down, it belongs to the biggest German gaming magazine.

There's no way this screenshot is fake. It is 100% real there's no point in denying it.

EDIT: The BETA is probably short because they are not testing content... They are testing TECHNICAL CAPABILITIES. That means they are probably testing how the game runs on a massive amount of hardware, different computer specs, different video cards (ATI, Nvidia), DX support, etc. All this comes into play on launch day so there is a minimal amount of crashes (black screens, blue screens, disconnects, etc)

EDIT 2: The people mentioning that the shot is the same from the "Wizard" trailer... IT IS NOT. The screens are completely different that you can even see the stairs on this one. There are no stairs in this screenshot: http://www.diablowiki.com/File:Diablo_III_screenshot_91.jpg
Also the amount of jars, the mobs positioning and even the shadow... It's 100% clear they are not the same shots.